I wonder what the night (?) sky would look like to an imaginary resident of a planet circling one of those stars in that cluster.
Regards,
Bill Lee
Search found 11 matches
- Thu Jan 23, 2020 3:36 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Globular Star Cluster NGC 6752 (2020 Jan 23)
- Replies: 17
- Views: 4346
- Wed Nov 27, 2019 9:55 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mercury and the Quiet Sun (2019 Nov 14)
- Replies: 27
- Views: 8473
Re: APOD: Mercury and the Quiet Sun (2019 Nov 14)
Can somebody explain why there will only be 14 transits in the 21st century. Seems to me that every time Mercury goes around the sun that it would be visible against the sun as a backdrop. I cannot envision the geometry that would limit that to only 14 in 100 years. Mercury's orbit doesn't lie on t...
- Thu Nov 14, 2019 3:23 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mercury and the Quiet Sun (2019 Nov 14)
- Replies: 27
- Views: 8473
Re: APOD: Mercury and the Quiet Sun (2019 Nov 14)
Can somebody explain why there will only be 14 transits in the 21st century. Seems to me that every time Mercury goes around the sun that it would be visible against the sun as a backdrop. I cannot envision the geometry that would limit that to only 14 in 100 years.
- Mon Sep 16, 2019 1:55 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Harvest Moon (2019 Sep 13)
- Replies: 22
- Views: 5844
Re: APOD: A Harvest Moon (2019 Sep 13)
Something strange with this picture. Somebody please explain. The picture looks like, and the caption says "...the full moon shining on with beautiful iridescent clouds at sunset." but the full moon can NOT be in a picture of a "sunset"! The moon is full when it is opposite the ...
- Sat Sep 14, 2019 9:42 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Harvest Moon (2019 Sep 13)
- Replies: 22
- Views: 5844
Re: APOD: A Harvest Moon (2019 Sep 13)
Something strange with this picture. Somebody please explain. The picture looks like, and the caption says "...the full moon shining on with beautiful iridescent clouds at sunset." but the full moon can NOT be in a picture of a "sunset"! The moon is full when it is opposite the s...
- Thu Dec 22, 2016 12:32 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: An Airplane Glory (2016 Dec 22)
- Replies: 21
- Views: 2627
Re: APOD: An Airplane Glory (2016 Dec 22)
Isn't this the same physics/geometry as a rainbow?The cause of the glory is still being researched and is reflect, refract, and diffract sunlight backwards towards the Sun.
R/
Bill Lee
- Sun May 22, 2016 9:57 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: LL Orionis: When Cosmic Winds Collide (2016 May 22)
- Replies: 14
- Views: 4023
Re: APOD: LL Orionis: When Cosmic Winds Collide (2016 May 22)
The description says "analogous to the bow wave of a boat moving through water or a plane traveling at supersonic speed."
A plane need not be traveling at "supersonic speed" to create a bow wave.
A plane need not be traveling at "supersonic speed" to create a bow wave.
- Sun Sep 27, 2015 12:11 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Tonight: A Supermoon Lunar Eclipse (2015 Sep 27)
- Replies: 13
- Views: 5224
Re: APOD: Tonight: A Supermoon Lunar Eclipse (2015 Sep 27)
Somebody needs to tell the NASA illustrator who produced the neat little video that the moon doesn't move south to north. Check out the video at about the 29-30 second mark.
- Thu Jun 14, 2012 1:43 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: M13: The Great Globular Cluster in... (2012 Jun 14)
- Replies: 27
- Views: 5072
Re: APOD: M13: The Great Globular Cluster in... (2012 Jun 14
What would the night sky look like on a planet around a sun within a cluster like that? Would there even BE a "night sky"?
- Wed Feb 15, 2012 12:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Rosette Nebula (2012 Feb 14)
- Replies: 29
- Views: 7479
Re: Thank you Ann, re: parallax and proper motion Re: Rosett
Thank you Ann for the enlightening explanation of parallax and proper motion, as well as spectra and brightnesses. I sorta knew this stuff, but to have it presented in relation to a beautiful image of the nebula surrounding a cluster I've seen through my little telescope in the backyard really brin...
- Tue Feb 14, 2012 12:49 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Rosette Nebula (2012 Feb 14)
- Replies: 29
- Views: 7479
Re: APOD: The Rosette Nebula (2012 Feb 14)
Warning : Newbie alert! I am NOT an astonomer or anything! But I enjoy the fantastic images in the APOD. I have gathered a large number of them and use them for my screen background. Question: How do you distinguish stars referenced in an image like the one today (Rosette Nebula) from foreground st...